You can use 3/32 solder, pull out the glow plug, insert slightly bent solder into plug hole, bring piston up to top dead center, and back down, then measure the thickness of the solder, it will give you deck height, I'm not sure what factory deck height is.

My Hobby 9 has been running good at around 250degrees, has a good amount of power with the RB 2045 / 198mm pipe. With my driving, I get around 10 - 11 minutes on a tank.

I have about 1.5 gallons through the engine and it still has crazy pinch, so much so that I sometimes need to heat it with a heatgun before my starter box will turn it over.

I picked up a WS9 that I was planning on running next year but for now, the Hobby 9 is going strong. Might need to sell the WS9 at this rate. :cry:

Greetings all,
Been running an S3 very happily, runs great but a little too slow for my competition. So I have purchased a B9, just put the engine in to start the break in process and realized the idle screw is about 1/4" or more screwed out, as this is the first time running this engine is this normal?

Thanks

Yes it is normal every C6 (B9) I have ever had is like that. The carb is designed differently and better then the "S" (Junior,Hobby,Series) line.

ya I hate how the idle needle is on the botton part of the carb on the sport line engines

Over priced con rod!
 

Hey Guys, I'm running a modded S7 and C6 and they are getting in need of conrods. At $61 plus shipping plus wrist pin and clips, the cost would be about $100 per engine. That's a hefty chunk of change, about the most in the industry. I heard there was a substitute con rod from a Nova or a Go tech that works just as well in these engines. Does anybody have knowledge or experience with this? Thanks for the help.

I have had RB engines for about 10 years, your money ahead by buying factory parts, it will fit best with the best quality in materials, you can try other brands that may fit, but when you have a bushing in the rod go out, if it's the wrist pin bushing, you will most likely need to replace the piston when they go, if the bottom bushing goes out, good chance cracking the engine case.

I believe a Novarossi R7 rod will work fine in your C6. It's probably the same part, as that RB engines is made by Novarossi. Not much cheaper than the RB part though. I don't know about the S7...

quick question:

is it normal for a ws7ii to run in the 280-290 degree range?
both my buddy and i both have these engines and they seem to run fine with good smoke annd no bogs, just hot.

thanks

Cool thanks for the replies guys.

Figured out the B in B9 stands for beast,damn but this engine is looking fast.
Done my 10 tank break in and getting ready to get my tune done.
Screw settings seem to be extremely sensitive to even the smallest adjustments, so this may take me a little longer. Not that this is a complaint, it was one of the easiest engine I have broken in. And I have broken in plenty.

Looking forward to the racing this Sunday, hopefully the weather will stay clear

I just broke mine in yesterday also. It was one of the easiest break-ins I have done. I have 8 tanks thru it so tomorrow I will get a race tune at the track.

It depends on the temp gun your using, if it's a raytec gun, thats normal, if your using an exergine temp gun, thats hot.

Hey everybody I got my "Killer 9" in today. It looks pretty mean. Can't beat the price either for about $230.00 They changed alot on this engine, carb is all composite with needle settings of 4 and 4 and the idle screw is to the back and flush in the carb and aluminum 8mm insert. I didn't open it but looking in the exhaust port it doesn't have the 2 little exhaust ports that the C6 has. I'm excited to get it but I won't be able to run until next weekend. I'm not going rush break in for Sunday. I have 3 paint jobs to do tonight and tomorrow.:p

BTW I ordered two and got them both!

My favorite engine on the planet. If you run it a little lean on the bottom and a little rich on the top, the temps will go down and the performance/mileage will go up. It ran hotter on 20% fuel than on 30%...but the track your running on makes a difference.

I would say yes. My hobby 9 runs at around 270. With the same plug I broke it in with. Don't tune with temp. Tune with sound.